Improvement in reclining-chairs



2 Sheets-Sheet1.

'1. M. BRINTNALL.

RECLINING-CHAIR.

Patented June13, 1876.

N.PETERS. PHOTO1LITNOGRAFHER. WASHINGTON. D C.

2 Sheets-.-Sheet 2.

T. M. BRINTNALL.

RECLINING-CHAIR.

No.178,591. Patented June'13,1876.

UNITED STATES PA'I E1\T T OFFIo.

THOMAS M. BRINTNALL, or raw YORK, N. Y., ASSIGNOR or ONE-HALF HIS RIGHT TO JOHN GOODGHILD, OF SAME PLACE.

lMPROFEMEN-T IN RECLlNlNG-CHAlRS- Specification forming part of Letters Patent No.fl78,59l, dated J one 13, 1876; application filed March 16, 1876.

To all whom it may concern Be it known that I, THOMAS M. BRINTNALL,

of the city and State of NewYork, have in;

vented certain Improvements in Reclining- -Ghairs, of which the following is a full, clear,

' my improved reclining-chair.

The nature of my invention consists in operating the seat and back of a reclining-chair, when said features are secured by pivot-bearings 0r keyed on axial shafts, through a simple and practical combination of mechanism,

which consists of right-and-left-hand screws, one operating each shank-nut, and pivoted levers orhalf-toggles. The screws are journaled in suitable bearings formed on or connected with the seat, while the nuts fit over the screws, their female threads meshing with the threads of the screw, so as to be operated simultaneously thereby, and caused to travel to and fro, as occasion requires. nuts are secured pivoted levers or half-toggles, so connected with the seat and back as to elevate or lower the same, as, through the action of their respective screws and nuts, the toggle-arms are drawn together or extended. Thus the seat and back are operated independently of, each other, and their position or inclination changed or shifted at pleasure, simply through the revolution of the screw, and its action through the nuts and pivoted levers.

The construction and operation of my in vention are as follows: A is the pedestal, which is cast or otherwise formed so as to provide a socket or seat, in which enters and is secured the post of the bearing B G, that supports the seat. This support is so seated in the pedestal as to permit of the. chair being freely revolved; or, if desired, it can be fastened in-a To the shanks of the stationary manner simply by tightening the screw a.. The form in which this support B C is cast or otherwise manufactured is clearly shown in Fig. 1. stirrup-bearing, O, in the vertical walls of which is journaled the revolving shaft d, to which is keyed, by suitable bearings, the seat D. In the lower bearing B of the support, by means of y a bolt, 2', is fastened the vertical slotted hearing I, in which are pivoted so as to allow of their free horizontal movement, as extended or drawn together, the levers or halftogglesK K. Onthe under surface of the seat 1) are securely bolted bearings g, in which are journaled the right-and-left-hand screws G L-the first to operate'thc seat D, the other to operate the back E. On the opposite threads of the screw G are secured the shanknuts H H, the female threads of which fit over and mesh with-the threads of the screw, and through its revolution they are moved toward each other or in the opposite direction, as oocasion requires. To the bearings h of the shank-nuts H (and which bearings, if desired,

may be slotted) are-secured, so as to provide pivot=joints, the upper sections of the levers or half-toggles K K, which, at their opposite ends, are pivoted in the slotted plate I. To the projecting shank of the screw G is secured,

.through an eye, f, the crank-handle F, by

means of which the screw is readily rotated. The back E is secured by means of an axial shaft, 6, in suitable bearings at the rear of the seat; or the shaft 0 may be dispensed with, as may also the shaft d, and the back and seat each secured by pivot-joints directly to their hearing. The back is provided with half-arms E, which terminate in projections E, at the lower ends of which is secured a slotted crossbar, M, as clearly shown in Fig. 2, and in which the levers or half-toggles N N have their lower pivot-bearings. The upper pivot-bearings of these levers N N are on the shanks 0 of the nuts 0 O, which nuts fit on the screw L, and are operated thereby, precisely as the shanknuts H H fit on and are operated by the screw G, and the connection of the shankscrews with the toggle-arms in both instances is precisely similar.

This slotted'cross-bar M, if desired, may be At its upper surface is a v ordinary angle of inclination.

dispensed with, and thelevers N N mayhave their lower pi vet-connections:niade- --directly, with the lower surface of the projections E of the back. To the extended shank of the screw L is attached, by means of an eye, 1), the

crank-handle P, by which the screw L is freely operated to lift 01'': lower 'theabackias occasion:

position of the seat the screw G is turned, :through thewcran'k F. filo-move yit toianiangle which leaves: thea' forward portion of the ;seat lower i than its rearl thescrew istu-rned.

I toward the .front until the desired inclination wis: reached. If in the-oppositedirection, it is readily accomplished simply by revolving the screw, turning thecrank in the other direction, and so with the back.

What I claim as new, and desire to secure iby Letters iPatentvofi the" United States ,.is

,:"A=-reclinin g-chair provided with right-andleft-hand screws, shank-nuts, and pivoted levers or half-toggles, substantially as set forth,

uwherebylthe seat-:orback, or both, can be operated, substantially as described, and for the purpose specified.

In testimony that I; claimz thetforegoin g as :myown I aifix my signature in presence of two witnesses.

THOMAS M. BRINTNALL. Witnesses:

ZEDWIINA'JAMES, I J. 3-1. a HOLMEAD. 

